Shuttle box operating mechanism for looms



(No Model.) I zsheets sheet 1.

W. SHAW.

SHUTTLE BOX OPERATING MECHANISM FOR LOOMS.

No. 352,783. Patented Nov. 16, 1886.

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(No Model.) 2Sheets-Shet 2.

W. SHAW. SHUTTLE BOX OPERATING MECHANISM FOR LOOMS.

" No. 352,783. 7 Patented Nov. 16 1886.

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UNITE STATES" PATENT OFFICE.

WRIGHT SHAW, OF BREDBUBY, COUNTY OF CHESTER ENGLAND.

ISHUTTLE-BOX-OPERATING MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 352,783, dated November16, 1886.

Application filed September I, 1884. Serial No. 141,939. (No model.)Patented in England May 1, 1884, No. 7,073.

checked fabrics illustrated and described in the I British Patent No.1,579 of 1857, granted to' myself and others.

The main objectof my present invention is to simplify and economize theconstruction of the drop-box motion and to bring the principal workingparts thereof within easyreach of the hand and eye of the weaver, aswell as to economize space.

In the accompanying drawings, Figure 1 is an end elevation with thecrank-shaft and part my improvements; and Fig. 6 is an enlargedsectionalplan View of another part of my improvements.

In some of its principal parts and operation the present machine isprecisely similar to that'- described and shown in the above-mentionedBritish Patent No. 1,579 of 1857, and I will first brieflydescribe themain parts which are similar in the two machines.

0 is the crank-shaft, and E thevibratin g lay which is connected to thecranks on the shaft 0 by the usual connecting-rods, O.

F represents the drop -boxes, (four being illustrated in the presentinstance,) supported on the lay by the upright rod 7, carrying at itslower end a rack, which is normally kept in gear with its pinion i by aspring, 7. In the present instance this spring is a spiral one, actingthrough a sliding rod,7 ,in a bracket, 7 Figs. 1 and 6 but in theBritish patent a curved springis shown for the samepurpose. As describedand shown in said patent, the pinion 1' is secured to the pinion, (l ofthe patent.)

with which either of the opposite rack-legs of the boot-jack h can bethrowninto gear; or both legs may be thrown out of gear with saidpinion, (leaving the latter midway between the two,) according to themovement desired to be imparted to the drop-boxes F threugh the pinion iand rod 7. The boot-jack is pivoted to the outer end of a lever, 1,pivoted at 6.0 1 to the frame of the machine, and adapted to be acted onby a tappet or tappets, 4 4, Figs. 1 and 2, on the cam or tappet shaft Dof the machine, the lever 1 being provided with a bowl, 2, for theaction of the tappets or earns g to raise and lower the boot-jack h, andconsequently the drop-boxes F.

The deyices for controlling the position of the boot-jack to move itinto and out of gear with its pinion and for moving the tappet 4 into orout of position to act on the bowl of the lever l are controlled by apattern-chain, and in the Patent No.'1,579 of 1857 these devices areshown and described as being at the lower part of the frame of themachine, along- 7 side the boot-j ack itself, the long pattern-chainpassing up to the top of the machine over two pegged cylindersinaddition to the pattern-cylinder. This construction, however, isinconvenient, andin order to render the devices easy of access to theweaver I place the devices at the upper part of the frame, and soconstruct them as to permit of the use of a short patternclfain and todispense with the extra pegged cylinders. 8 5

The pattern-cylinder a is carried by the vibrating-bracket n, which ismounted on the pivot, 12. on the frame, and is adjustably connected by abolt, 19, to the arm 18 on the same pivot n. Vibrating motion isimparted to the bracket 42 from the cam 11, Fig. 5, on the tappet-shaftD acting on the lever 12 on the shaft 12, as hereinafter described. Thisshaft 12 also carries the arm 16, Fig. 1, which is connected to the arm18 by the rod 17. 95

The pattern-cylinder a has preferably eight faces, as shown in Figs-1and 4, and has an axis, Z, which is free to turn in the upper end of thevibrating bracket n, and which carries the usual spider-wheel, r, forengagementwith the pawl 8, Figs. 1 and 4, pivoted to some fixed part ofthe frame. By this means the pattern-cylinder will be turned to bring anew section of the patternchain into position to ICO act on the rods b cd, unless the fixed stop q, coming into contact with the pins 10 on asupplementary disk, 70, as hereinafter explained, prevents the bracketfrom coming up far enough for the hook s to engage with the next peg ofthe spider r. l

The rods 11 0 cl are similar in constructio and operation to thosedescribed in the British patent, the two outer ones being pivoted to theopposite ends of the swivel bracket or arm e at the top of the verticalshaft f, while the central sliding rod, 0, has a cam portion, 0', Fig.4, acting on an arm, 15, on the upper end of a tubular shaft, a, free toturn on the rod f. All three rods 5 c d are guided in a bar, g, on theframe of the loom. The vertical shaft f is mounted in suitable bearingsin the frame of the machine, and has fixed to its lower end an arm, 9,whichcarries a link, 9, having a notched end, as shown in Fig. 2, toengage with a rib on the boot-jack h, as described in my former Britishpatent. The movement imparted to either of the rods 1) or d by thepattern chain '6 is thus transmitted by the shaft f, arm 9, and link 9to the boot-jack to throw it into or out of gear with its pinion, toenable the drop-boxes to be operated or not from the lever l, which iscontrolled by the tappets or cams 4 onthe cam-shaft.

The tubular shaft 10 carries at its lower end a fork, 3, to act on thetappet 4, which can be moved longitudinally on the shaft D, so that whenthe central rod, 0, is pushed in by ablank on the pattern-card its camc, acting on the arm 25, partially turns the tubular shaft u, and

by the fork 3 moves the double lift cam or tappet 4 into engagement withthe cam 4, to act on the lever 1, as described in my former Britishpatent.

In order to economize the pattern-chain, I provide devices whereby thepattern-cylinder a may be retained in position to repeat for, say, four,six, or any desired number of picks.

On the axis Z, but free to turn thereon, is a disk, k, carrying a numberof pegs, m m, which, as the bracket n moves back and forth, come intoengagement with a pawl or hook, 0, pivoted to the frame, Figs. 3 and 4:.By this means an intermittent rotary motion is imparted to the disk Z.On the opposite face of the disk Z are provided removable screw-pins 9,Figs. 3 and 4., the number and relative positions of which will varywith the desired pattern to be woven.

On the frame is a fixed stop, q, in such a position that as one of thepins 19 comes into line therewith in the rotation of the disk Z the pinwill come into contact with the stop q, as shown in Figs. 3 and 4, asthe vibrating bracket n moves up toward it. This stop will thus preventthe bracket 1 from coming far enough forward to permit the hook or pawls to engage with the pegs of the spider r to turn the pattern-cylinder.By this means the patterncylinder may be retained in the same position,and the pattern may be consequently repeated for any number of picks, aslong as there are pins 19 to present themselves to the stop q,- butinthe absence of a pin 19 to come into contact with the said stop as thedisk It is rotated, the bracket n,with the pattern-cylinder,

whenever one of the stop-pins p comes into.

contact with the stop q, the cam 11, Fig. 5, which actuates the bracketthrough the devices before alluded to, is made agrooved cam, and ayielding bowl, 13, on the lever 12 travels in this groove. The bowl 13is mounted in a bearing-block, 14:, free to slide upward in ways in thelever nearly at right angles to the length of the latter. A spring, 15,presses on the top of the bowl or bearing-block, keeping it normally toits lowest position in the lever; but when the movement of the vibratingbracket a is arrested by the stop q, as before described, the spring 15will allow the bowl 13 to yield upward, so that the cam 11 can continueits movement without moving the le- -ver 12. The same action is producedwhen the end of the lever 12 is held down by any other cause-as, forinstance, by the ordinary action ofthe weft-fork motion in the event ofthe weft-thread breaking, as described in my former British patent.

The tubular shaft a, which carries the fork 3 to throw the cam or tappet4: into or out of action, also carries an arm, 11, connected by a link,w, to a lever, m, Fig. 2, pivoted to the frame. This lever carries twoshort platesprings, y and z, to act as yielding stops on the boot-jacklever 1, to prevent jumping of the shuttle-boxes when the machine isrunning at a high speed. When the two outer rods, b and d, are workingthe single lift, only one of these springs, z, acts on the lever 1,nearly over the bowl 2; but when the central rod, 0, comes into actionfor the double lift, the movement of the tubular shaft u throws thespring 2 clear of the lever and throws the spring-stop y over the lever1 at a point farther away from the fulcrum of the latter, so as to workwith an increased pressure on a longer leverage.

In my former British patent I have described the drop-boxes as supportedby a single coiled wire spring connected at one end to the lay and atthe other to the upright rod which car ries the drop-box; but in orderto obtain a very long spring and a consequent minimum of action of eachindividual coil, I provide a spring in two parts, 5 5, united by a cordor strap, 8,

which passes over a pulley, 20. The opposite as acting on the springwhich presses the rack of the drop-box rod into contact with its pinion.In the present case, however, Iprovide on the upright rack 7 aprojecting flange, 9, as, shown in the enlarged plan, Fig. 6, andagainst this a stud or projection, 10',, on the rack-handle 10 acts tothrow the rack 7 out of gear with its pinion i when it is desired toraise or lower the shuttle boxes by hand. If preferred, this rack-handlemay be made in the form of a treadle to be moved by the foot, so as tohave both the weavers hands at liberty to. work the shuttle-boxes.

I claim as my invention- 1. The combination of the pattern-cylinder aand means for vibrating the same, the three rods b e d, and pivoted arm6, connecting the two outer rods, the pattern-cylinder and rods being atthe top of the loom, with the dropboxes, boot-jack, and its pinion andconnecting devices, substantially as set forth, whereby the boot-jackcontrols the drop-boxes, lever carrying the boot jack, lifting mechanismtherefor, and devices, substantially as specified, intermediate of theboot'jaek and lever and rods b d, whereby the latter control theboot-jack, all substantially as described.

2. The combination of the pattern-cylinder, carrying-bracket, and meansfor vibrating the latter, with a. fixed stop, q, a spider, r, on thecylinder, a loose pegged disk, is, carrying removable pins p,'and pawlsor hooks s 0, to engage with the spider and pegged disk, allsubstantially as specified.

3. The combination of the pattern-cylinder and-vibrating devicestherefor, sliding rod 0, tubular shaft a, arm 1. on one end ofsaid shaftand fork 3 at the other, with cam-shaft, tappets or cams thereon, lever1, boot-jack h, dropboxes, and devices, substantially as set forth,connecting the said boot-jack and drop-boxes, all substantially asspecified.

4. The combination'of the pattern-cylinder and vibrating mechanism,shaft u, and intermediate devices, as described, whereby the said shaftis partially turned, with the arm 0 on the shaft, link to, andspring-carrying lever x, lever 1, and operating devices, the dropboxes,and devices connectingthem with said lever, all substantially as setforth.

5. The combination of the pattern-cylinder and bracket and stoppingdevices therefor, a shaft, 12, and devices connecting the shaft to thecylinder-bracket, with a lever, 12, on the shaft 12, a movablebearing-block on the lever, a bowl in the said block, a spring, 15, anda grooved cam, 11, and cam-shaft, all substantially as set forth.

6. The combination of the drop-boxes, their supporting-rod, andconnecting-rack having a flange, 9, with a pinion and devices,substantiallyas described, to operate the pinion, a spring to keep therack ingear with its pinion, and a handle, 10, having a projection toact on the flange of the rack, as described.

7. The combination of the lay, drop-boxes, andcsupporting-rod with atwo-part balancing-spring connected at one end to a fixture and at theother end to the rod, connectingstrap 8, and a pnlley, .20, over whichthe strap passes,'all substantially as set forth;

In testimony whereof Ihave signed my name to this specification in thepresence of two subscribing witnesses.

WRIGHT SHAW. Witnesses:

GEORGE DAIRES, JNo. HUGHES.

